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Citronella grass has been serving from years as a mosquito repellent in the field of ancient and modern medicine. Commercially available mosquito repellents are chemical based and disastrous to human health. An attempt has been made to prepare a 100% herbal product based on Citronella leaf remains which is left out and of no use after steam distillation. It is cheap, effective and environment friendly. It is a first and preliminary work based on formulating and evaluating herbal mosquito repellent cakes using natural binders such as neem powder, potato starch, corn starch, coconut shell powder, wood powder and cow dung. The efficacy of prepared citronella leaf cakes were evaluated on three different parameters such as flammability, burning time and mosquito repellency test. Also, the cakes were sprayed with different concentrations of Citronella oil. Based on the results obtained from these parameters, the residual percentage of each combination of cakes was calculated and it suggested that Neem powder cake has the most effective repellency activity when impregnated with 10% Citronella oil.